PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

125500Mount,resilient,weapon System

Trw Assemblies and Fasteners Group Fasteners Div · NSN 5342-00-860-3765 · FSC 5342 · Mount,resilient,weapon System
Verified by PartsTable
NSN 5342-00-860-3765 — this item is cataloged by the U.S. Government under National Stock Number 5342-00-860-3765. Primary manufacturer part number: 125500.
Features
  • Mount,resilient,weapon System — FSC 5342
  • Material Document and Classification: QQ-A-250/8, ALLOY 5052 FED SPEC SINGLE MATERIAL RESPONSE CUP
  • Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE MOUNTING PLATE
  • Style Designator: ROUND W/BUSHING FOUR-HOLE FLANGE
  • Material: ALUMINUM ALLOY WASHER
  • Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE WASHER
  • Distance From Flange to End: 0.620 INCHES NOMINAL IN
  • Shortest Distance Between Mounting Hole Centers: 1.000 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum Alloy Washer construction
General Description

The Mount,resilient,weapon System, cataloged under National Stock Number 5342-00-860-3765, is classified within Federal Supply Class 5342 (Mount,resilient,weapon System) of the Hardware and Abrasives group. The primary manufacturer of record is Trw Assemblies and Fasteners Group Fasteners Div. Government technical data includes 26 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5342-00-860-3765
Primary Part Number125500
Item NameMount,resilient,weapon System
FSC / FSG5342 / 53 — Mount,resilient,weapon System
ManufacturerTrw Assemblies and Fasteners Group Fasteners Div
StatusCANCELLED
Material Document and ClassificationQQ-A-250/8, ALLOY 5052 FED SPEC SINGLE MATERIAL RESPONSE CUP
Surface Treatment Document and ClassificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE MOUNTING PLATE
Style DesignatorROUND W/BUSHING FOUR-HOLE FLANGE
MaterialALUMINUM ALLOY WASHER
Surface Treatment Document and ClassificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE WASHER
Distance From Flange to End0.620 INCHES NOMINAL IN
Shortest Distance Between Mounting Hole Centers1.000 INCHES NOMINAL IN
MaterialALUMINUM ALLOY MOUNTING PLATE
Flange Mounting Hole Diameter0.140 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
Height1.250 INCHES NOMINAL IN
Surface TreatmentCHROMATE WASHER
Load Rating1.50 POUNDS MAXIMUM LBS
Surface TreatmentCHROMATE SPACER
Material Document and ClassificationQQ-A-250/8, ALLOY 5052 FED SPEC SINGLE MATERIAL RESPONSE WASHER
Surface Treatment Document and ClassificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE CUP
Material Document and ClassificationQQ-A-250/8, ALLOY 5052 FED SPEC SINGLE MATERIAL RESPONSE MOUNTING PLATE
Surface TreatmentCHROMATE MOUNTING PLATE
Distance Between Mounting Hole Centers1.000 INCHES NOMINAL IN
MaterialALUMINUM ALLOY SPACER
MaterialALUMINUM ALLOY CUP
Flange Thickness0.040 INCHES NOMINAL IN
Flange Width1.250 INCHES NOMINAL IN
Inside Diameter0.169 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE SPACER
Surface TreatmentCHROMATE CUP
Flange Length1.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
4520-00-010-55943-29-42-1 INTERCHANGEABLE
Heating Element,electrical,nonim
Watlow Electric Manufacturing Co Dba Watlow
5330-00-914-582842380 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
5962-01-097-7471 INTERCHANGEABLE
Microcircuit,linear
5120-01-252-3906003 0621 INTERCHANGEABLE
Fixture,lathe
Deutz Corporation
5975-01-561-2547 INTERCHANGEABLE
Conduit,metal,flexible
4940-01-594-409734261 INTERCHANGEABLE
Heat Gun,electric
Steinel America Inc
Cross-Reference Index
Part NumberManufacturer
125500 Trw Assemblies and Fasteners Group Fasteners Div (USA)
3426-1 Hutchinson Aerospace & Industry, Inc. Dba Barry Wright Corp (USA)
3426-1 National Pipe Co (USA)
Related Parts
4520-00-010-5594INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
3-29-42-1
5330-00-914-5828INTERCHANGEABLE
SEAL,PLAIN ENCASED
42380
5962-01-097-7471INTERCHANGEABLE
MICROCIRCUIT,LINEAR
5120-01-252-3906INTERCHANGEABLE
FIXTURE,LATHE
003 0621
5975-01-561-2547INTERCHANGEABLE
CONDUIT,METAL,FLEXIBLE
4940-01-594-4097INTERCHANGEABLE
HEAT GUN,ELECTRIC
34261

Frequently Asked Questions

What is NSN 5342-00-860-3765?

NSN 5342-00-860-3765 is a Mount,resilient,weapon System, manufactured by Trw Assemblies and Fasteners Group Fasteners Div, classified under FSC 5342 (Mount,resilient,weapon System). Status: cancelled.

What are the part numbers for NSN 5342-00-860-3765?

NSN 5342-00-860-3765 has 3 cross-referenced part numbers: 125500 (Trw Assemblies and Fasteners Group Fasteners Div), 3426-1 (Hutchinson Aerospace & Industry, Inc. Dba Barry Wright Corp), 3426-1 (National Pipe Co).

What NSN replaces 5342-00-860-3765?

There are 6 known substitutes for 5342-00-860-3765: 4520-00-010-5594, 5330-00-914-5828, 5962-01-097-7471 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 125500?

Key specifications for 125500: Material Document and Classification: QQ-A-250/8, ALLOY 5052 FED SPEC SINGLE MATERIAL RESPONSE CUP; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE MOUNTING PLATE; Style Designator: ROUND W/BUSHING FOUR-HOLE FLANGE; Material: ALUMINUM ALLOY WASHER. 26 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5342-00-860-3765 still in active supply?

NSN 5342-00-860-3765 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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